.login_box {
     /*margin:0 auto;*/
     width: 340px;
     height: 350px;
     position: absolute;
     left:50%;
     top:50%;
     margin-top: -175px;
     margin-left: -170px;
     background-color: white;
     border:1px solid deepskyblue;
}

.regist_box{
    width: 340px;
    height: 440px;
    position: absolute;
    left:50%;
    top:50%;
    margin-top: -220px;
    margin-left: -170px;
    background-color: white;
    border:1px solid deepskyblue;

}

.platform_title{
    display: inline-block;
    position: absolute;
    width: 100%;
    height: 50px;
    top:50%;
    margin-top: -240px;
    line-height: 50px;
    padding-top: 15px;
    color: #444;
    font-size: 34px;
    font-weight: 700;
    text-align: center;
}

.box_title{
    display: inline-block;
    width: 100%;
    height: 50px;
    line-height: 50px;
    padding-top: 15px;
    background: #fff;
    color: #444;
    font-size: 18px;
    font-weight: 700;
    text-align: center;
}

.input_elem {
    line-height: 45px;
}

.input_inner {
    position: relative;
    width: 250px;
    left:50%;
    margin-left: -130px;
    font-size: 14px;
    line-height: 24px;
    border-radius: 4px;
    border:1px solid #d8dce5;
    padding-left: 10px;
}

.login_button {
    position: relative;
    width: 260px;
    height: 32px;
    left:50%;
    margin-top: 10px;
    margin-left: -130px;
    font-size: 15px;
    border-radius: 3px;
    border-color: #5490f3;
    color: white;
    background-color: #5490f3;
    line-height: 1;
}

.copyright{
    position: absolute;
    bottom:30px;
    width: 260px;
    left:50%;
    margin-left: -130px;
    font-size: 15px;
}
.must_input{

    position:relative;
    left:-110px;
    top:4px;
    color:darkgray;
}
.has_exsit{
    position:relative;
    left:158px;
    top:4px;
    color:red;
    font-size: 12px;
    display: none;
}
/*----------------*/
.regist-wrap-dialog {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    font-size: 16px;
    text-align: center;
    background-color: rgba(0, 0, 0, .3);
    z-index: 999;
    /*居中 */
    display:flex;
    justify-content:center;
    align-items:center;
}
.regist-dialog {
    position: relative;
    margin: auto;
    width: 300px;
    background-color: #FFFFFF;
}
.regist-dialog .regist-dialog-header {
    height: 30px;
    padding: 10px;
    background-color: #2388ea;
}
.regist-dialog .regist-dialog-body {
    /*height: 80px;*/
    padding: 20px;

}
.regist-dialog .regist-dialog-footer {
    padding: 8px;
    height:40px;
    background-color: #f5f5f5;"
}
.regist-btn {
    width: 70px;
    padding: 2px;
}
.hide {
    display: none;
}
.ml50 {
    margin-left: 50px;
}